var layer_floor_QHKG;
viewer.scene.addS3MTilesLayerByScp(SYS.TilesScpUrl,{name : 'buildingFloor21'}).then((layer)=>{
    var ids = get_arr(0, 2000);
 
    layer_floor_QHKG = viewer.scene.layers.find("buildingFloor21");
    layer_floor_QHKG.visible = false;
    layer_floor_QHKG.selectEnabled = true;
})

